a/vk: Fill in timestamp feature information

src/xrt/auxiliary/vk/vk_bundle_init.c

@@ -151,6 +151,16 @@ vk_fill_in_has_instance_extensions(struct vk_bundle *vk, struct u_string_list *e
  *
  */
 
+static void
+fill_in_device_features(struct vk_bundle *vk)
+{
+	VkPhysicalDeviceProperties pdp;
+	vk->vkGetPhysicalDeviceProperties(vk->physical_device, &pdp);
+
+	vk->features.timestamp_compute_and_graphics = pdp.limits.timestampComputeAndGraphics;
+	vk->features.timestamp_period = pdp.limits.timestampPeriod;
+}
+
 static bool
 is_fence_bit_supported(struct vk_bundle *vk, VkExternalFenceHandleTypeFlagBits handle_type)
 {
@@ -871,6 +881,9 @@ vk_create_device(struct vk_bundle *vk,
 		return ret;
 	}
 
+	// Fill in the device features we are interested in.
+	fill_in_device_features(vk);
+
 	// We fill in these here as we want to be sure we have selected the physical device fully.
 	fill_in_external_object_properties(vk);
 
@@ -985,6 +998,9 @@ vk_init_from_given(struct vk_bundle *vk,
 	}
 #endif
 
+	// Fill in the device features we are interested in.
+	fill_in_device_features(vk);
+
 	// Fill in external object properties.
 	fill_in_external_object_properties(vk);
 

src/xrt/auxiliary/vk/vk_helpers.h

@@ -95,6 +95,12 @@ struct vk_bundle
 
 	struct
 	{
+		//! Are timestamps available for compute and graphics queues?
+		bool timestamp_compute_and_graphics;
+
+		//! Nanoseconds per gpu tick.
+		float timestamp_period;
+
 		//! Were timeline semaphore requested, available, and enabled?
 		bool timeline_semaphore;
 	} features;

src/xrt/auxiliary/vk/vk_print.c

@@ -35,10 +35,14 @@ vk_print_device_info(struct vk_bundle *vk,
 void
 vk_print_features_info(struct vk_bundle *vk, enum u_logging_level log_level)
 {
-	U_LOG_IFL(log_level, vk->log_level,                            //
-	          "Features:"                                          //
-	          "\n\ttimeline_semaphore: %s",                        //
-	          vk->features.timeline_semaphore ? "true" : "false"); //
+	U_LOG_IFL(log_level, vk->log_level,                                       //
+	          "Features:"                                                     //
+	          "\n\ttimestamp_compute_and_graphics: %s"                        //
+	          "\n\ttimestamp_period: %f"                                      //
+	          "\n\ttimeline_semaphore: %s",                                   //
+	          vk->features.timestamp_compute_and_graphics ? "true" : "false", //
+	          vk->features.timestamp_period,                                  //
+	          vk->features.timeline_semaphore ? "true" : "false");            //
 }
 
 void